Grand Theft Auto 3 Walkthrough -
The Pick-up
You get this mission as a note on the table. Collect cash from laundry, watch out for triad.

The pickup is in an alleyway with 3 entrance. When you pick up the cash, attackers come from all 3 sides. Ooooh, surprise!

You have to kill them all. So, to start with, back a hefty car car in all the way next to it. Grab the cash, jump in the car. Now just go forward and backward to run them all over. Be sure to back up enough that they can't get in with you while you go back and forth. Now gather up the weapons. There's still a triad van out on street.

Do NOT grenade it. This make it hard to get back. Instead, let it chase you out to the truck, when you get out he gets out, just shoot him.